Vulnerability Description
MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment. A parameter written boundary((c))="A" or boundary(\))="A" is stored under that literal name rather than as boundary. A second boundary parameter is then not reported as a duplicate, and MIME::Parser splits the message on it. Readers that skip comments as RFC 5322 allows take the first boundary instead. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-116272?
CVE-2026-116272 is a documented vulnerability. MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment. A parameter written boundary((c))="A" or boundary(\))="A" is stor...
How severe is CVE-2026-116272?
CVSS scoring is not yet available for CVE-2026-116272. Check NVD for updates.
Is there a patch for CVE-2026-116272?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.